Q.

Which of the following is not a Lewis acid?

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a

FeCl3

b

AlCl3.6H2O

c

SnCl4

d

AlCl3

answer is D.

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Detailed Solution

  • For a compound to act as lewis acid it must have vacant d-orbital in its central atom.
  •  In AlCl3.6H2O, the central atom is aluminium and it doesn’t have any vacant orbital to accept the electrons. So, it cannot acts as lewis acid.
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